Perforating apparatus for making register-bands.



.. v E. EHRHARDT. PERFORATING APPARATUS FOR MAKING REGISTER BANDS.

APPLICATION FILED DEC. 10, I9i2.

Patented May 11, 1915;

3 SHEETSSHEET I.

47L- 4 1 I lip-2 E. EHRHARDT.

PERFORMING APPARATUS FOR MAKING REGISTER BANDS.

APPLICATION FlLED DEC. 10, 1912.

1,138,945. Patented May 11,1915.

' 3 SHEETS-SHEET 2. Jig- J 0 Q o E I o i g i I o I o o l o o o o o 0 o o l o o 0 o 0 c o o o o o i I i i I 1 z -1 P- J L- 4 E. EHRHARDT.

PERFORATING APPARATUS FOR MAKING REGISTER BANDS. APPLICATION FILED DEC. 10. 1912.

1,138,945. Patented May 11, 1915.

3 SHEETS-SHEET 3- HmUrzzUmU 0 If 72; Z

UNITED STATES PATENT OFFICE.-

EBWIN EHRRARDT, OF PANKOW, NEAF. BERLIN, GERMANY, ASSIGNOB TO SIEMENS & HALSKE A.-G., 0F BERLIN, GERMANY, A CORPORATION OF GERMANY.

PERFORATING APPARATUS FOR MAKING- REGISTER-BANDS.

Application filed December 10, 1912. Serial No. 786,010.

To all. whom it may concem Be it known that I, Enwm Emminn'r, a citizen of the German Empire, and residing at Pankow, near Berlin, Germany, have invented certain new and useful Improvements in Perforating Apparatus for Makg Register-Bands, of which the following is a specification.

My invention relates to an electromagnetic perforating apparatus comprising a typewriter keyboard for making register bands for telegraphic and similar purposes.

A primary object of my invention is to provideimproved perforating apparatus of this type which differs from devices of the same type known heretofore not only owing to its mechanical simpility and certainty of operation, but,particu-larly, owing to its affording the possibilities of using a very small number of punches and other moving parts. I obtain these advantages, which are of great practical importance, substantially by controlling the movement of the punches by means of one distributing disk common to all the characters or symbols according to contacts which are closed by depressing the keys, the number of contacts so closed by a key depending on the character or symbol in question which is to be represented in the band.

To these ends my invention consists the constructions and combinations of parts hereinafter described, and particularly recited in the claims.

Several illustrative embodiments of my invention are represented by way of ex-' ample in the accompanying drawings, wherein Figure 1 is a plan view showing a register band perforated by a perforatin apparatus according to the invention, t e various symbols being'of various lengths; Fig. 2 is a diagram showing one form of my improved perforating, apparatus comprising an electromagnetmally actuated paperband feed-mechanism; Fig. 3 is a plan view showing a register band in which the individual symbols are of a uniform length; Fig. 4 shows a modified form of my improved perforating apparatus in which the paper band is fed at a constant speed; Fig. 5 is an elevation showing a key n its normal position, and Fig. ,6 is a like view show.

" keys.

7 1s a diagrammatic elevation showing a modilied form of locking device for the bol herein implies not only one hole or a combination of holes or perforations, but

also a. gap or space or the combination Patented May 11,1915.

the same key depressed and locked; Fig.

of a gap or space with one or more holes, such gaps or spaces being obtained in the band when the band is fed forward one ormore steps without being perforated. The spaces in the band between symbols are not,

however, termed symbols. Consequently, the punching mechanism for making the row Z of symbols comprises only onesingle electromagnet E,, as shown in Fig. 2, whose armature when attracted strikes the punch C through' the paper.

Referring to Fig. 2, when the electromagnet E is energized the pawl D rotates the ratchet wheel F and with it the axle G carrying the sprocket-wheel G one step forward, whereby the paper band A is always fed forward an equal amount, 6. g. the distance between two guide holes. The distributing disk H has two rings J and K of contact-pieces. In this illustrative embodiment each of these rings comprises five segments a, b, 0, (Z, 6, and f, g, h, 2', j respectively, insulated from one another. The electrically connected brushes L L carried by the arm M, slide on the two rings J and K. The brush-arm M may be rotated by a motor, for example, by means of a friction clutch, but the means for driving the brush arm M are not shown on the drawing for the sake of clearness. When the keys are not being operated the front beveled end Q of the brush-arm M rests on a stop P and is accordingly prevented from rotating. In this position the brushes L and L, are located on the segments 6 and j, respec tively, of the rings J and K, respectively. The typewriter keyboard comprises ei ht key-levers T to T under which are ve contact'bars S to S As clearly shown in Figs, 5 and 6 each of these contact-bars is provided with resilient contact-pieces n, to 11,. Each .key T to T carries a contactpin 70,, so that when a key is depressed a connection of the bar S is established with the key at the end of the stroke of the key. When a key is depressed a short rush of current consequently flows from the positive pole of the source of current R by way of the depressed key to the bar S the electro magnet E the condenser V and back to the negative pole of the source of current R. The electromagnet E is temporarily energized by this short rush of current which charges the condenser V, and the stop or lever P is removed from the end Q of the arm M. During the revolution of the arm M which now takes place the stop P\ is returned by its spring p into its normal position, so that after the arm M has completed one revolution it is arrested. When the depressed key returns into its rest position the connection of the pin 70, with the bar S is broken, and the condenser V discharges across a .high resistance W. The weak current which flows besides the operative condenser current proper during the depression of a key over the the resistance lV and the electromagnet E exercises no material effect on the stop P. While the electrically connected brushes L and L,

pass over the rings of contacts J and K the working operations, punching and feed of the paper, prepared by the depression of one of the keys T to T are performed in succession at the corresponding electromagnets. For this purpose, on the one hand the segments a, b, c and d of the ring J are electrically connected with the contact-bars S S S S and, on the other hand, the segments 7, h and g, i are electrically connected with the punching and paper-feed electromagnets E E respectively. In order to produce the various symbols the keys T to T are provided with contact-pins k, to In, which contact with the corresponding bars S to S when a key is depressed.

Fig. 3 shows a perforated band in which the individual symbols have a uniform length. These symbols are composed of at most two individual holes arranged at various places, and the possibilities of combination designated 1 to 4 are obtained.

Fig. 4 shows a perforating apparatus for making symbols of a uniform length. This apparatus differs from that described above in that the paper band A is fed .at a constant velocity, the feed roll or sprocketwheel a being driven by a shaft m driven by means of worm gearin 2 by the shaft carrying the brush-arm As it is not necessary to close a circuit for energizing a feed magnet, as in the case of the magnet E in the embodiment shown in Fig. 2, the distributing disk H issimplified inasmuch as the inner ring at is subdivided only at the Licence segment on which the brush L rests in its norm position; further, segments of insulation 3 are provided in the'outer ring between the two segments 12' and w in the punching circuit, and these segments y allow the punching magnet E time for returning into its rest position before the next punching operation. This perforating apparatus operates otherwise in the same manner as described above with reference to Fig. 2. As soon as one of the keys, e. g. T is depressed, a charging current flows from the battery R by way 0 the bar t, the contactbar S the releasing magnet E the condenser V and back to the battery. The arm M is released and begins to rotate, whereupon it feeds the paper band A forward a corresponding distance. The circuit 'of the magnet E, which normally attracts the arresting bar Z is broken by the brushes L,, L, at the segments 6, 3' so that the bar Z holds the depressed key T in its lower position. As soon as the brush L slides over the segment 'w the circuit of the punching magnet E is closed over the battery R, the contactbar S the segment w, the brushes L L,,, the electromagnet E and the negative pole of the battery. While the brush-arm M passes over the segment y the punching lever of the magnet E returns into its rest position, whereupon it is attracted again as soon as the brush L passes over the segment 0, the circuit being now closed over the contact-bar S It is essential in the two embodiments shown in Figs. 2 and 4 that a key once depressed shall remain in its lowest position at least until the brush-arm M has completed one revolution. To this end, I provide an automatic key lock which is represented in Figs. 2, 4, 5 and 6. Each key carries a hook m, and a locking bar Z is arranged below the keys for engaging these hooks. As shown in Fig. 2, in the rest position of the apparatus the brushes L L are located just on those segments e, j which are connected over the source of current R with the electromagnet. E of the key locking device, so that in this position the bar Z is attracted. When a'key is depressed the brush-arm M is released, as described above, and the brushes L L leave the segments 6 and j. At this moment the electromagnet E, becomes currentless in consequence of its circuit being broken, whereby the locking bar Z is engaged by its spring 9 with the hook m of the depressed key and locks this key until the brush-arm M has completed its revolution. The electromagnet E is then energized afresh over the segments 6 and j, the locking bar Z is removed from the hook m and the key is returned by the spring 1' into its rest position.

The keys can be locked in a similar manner mechanically by means of the arrangement diagrammaticallly represented in Fig. 7. The locking lever is lengthened in the form of a rod t'beyond its pivot, at which it is formed as a hinge; the locking lever and the rod can be shifted longitudinally together in the guide bar u. The free end of the rod t bears -on a stop 1) provided on the locking bar Z. As long as the arm M is in its rest position and under the influence of the force driving it and. bears with pres sure against the locking lever P, this is "pushed downward together with the rod t in consequence of this pressure, so that the spring 9 is overcome and the locking device of the keys is released. As soon as the arm M has begun to rotate'after this release has taken place, the spring 9 operates and drives the locking bar Z into its locking position and simultaneously shifts the rod 25 and the lever P upward. When the arm M strikes at the end of its rotation against the lever P, the keys are unlocked in the manner described above.

Owing to the described improved manner of locking the keys-it is prevented that a second key can be depressed before the previously depressed key has returned into its rest position, because if a second key were struck too soon its hook we would strike on the upper edge of the locking bar Z.

The perforating apparatus shown in Fig. 2 operates as follows: Assuming that the perforated symbol designated 3 in ig. l is to be punched in the band, the key 1 must be struck. This key possesses besides the releasing contact is, for the brush arm M common to all the keys additional contacts 7 70 for the bars S S and S After the key T has been depressed the brush-arm M is released owing to the circuit of the electromagnet E being closed at the contacts 16 S and the brushes L L pass over the rings J and K and successively connect in circuit the segments af, by and oh. The last pair of segments dd remains uninfluenced, as no contact is provided at the key T for the segment d or its bar S VYhen the brushes pass over the pair of segments a7 a current flows from the positive pole of the source of current R to the depressed key T the contact-bar 8,, segment a, brushes L L segment 7, punching magnet E and back to the source of current R. The electromagnet E is hereby energized and punches a hole in the paper band A. When the brushes L L contact with the pair of segments by during the further rotation of the brush-arm M, a current flows from the source of current R to the depressed key T contact-bar 8,, segment 6, brushes L, and L segment g, electromagnet E and back to the source of current, whereby the electromagnet E is energized and the paper band A fed one step fortact-pieces in such manner that by depressing the individual keys the eight symbols represented in Fig. 1 can be made which, as will be seen, differ from one another both in the number, position or absence of the holes and also in the number of feed steps separating them.

It should be particularly noted that the sequence of the symbols shown in Fig. l for convenience on a continuous strip, has nothing to do with the sequence in which the keys T T are shown. For instance, the keys T and T should not be operated successively Without the intermediate operation of the key representing symbol 7 (Fig. 1), which latter symbol is at the same time equivalent to two spaces, because otherwise in the particular arrangement of the disk H shown here, the punch C would perforate the paper twice in the same spot and finally advance the paper only one space. Possible disadvantages which might result from such special direction as to the operation of intermediate. keys Wherever necessary, are not taken into account in the present invention, as they can easily be overcome by means not illustrated here, and such means do not form part of the particular subject matter of my invention, which is only diagrammatically shown here, and which covers in general the combination with a source of current, a punching apparatus comprising punching electromagnet having one pole connected to one pole of the source of current, and a keyboard having all the keys connected to the other pole of the source of current, of a plurality of contact bars adapted to be contacted by the keys, one single distributing disk comprising a plurality of rings of segments connected to said contact bars and to the other pole of said electromagnet, and means for electrically connecting together the segments of one ring with those of another.

In practice the construction of the apparatus will of course be modified when it is necessary to represent in a band a considerably larger number of characters or symbols, 6. 9. about 60 in the case of Morse text. Corresponding to the larger number of keys requisite it will be necessary to increase the number of the contact-pieces to be closed by the individual keys in order to obtain the requisite difi'erentiation in making contact and, correspondingly, a larger number of contact-pieces will have to be provided in the distributing disk,

&

- which contact-pieces will be connected one with another and with the punching magnet E or the feed magnet E in a manner suitable for distinguishing the individual symbols from one another.

I claim 2-- 1. In'electromagnetic perforating apparatus of the character described, the combination with a source of current, a punching apparatus comprising a punching electromagnet having one pole connected to one pole of the source of current, and a keyboard hav ing all the keys connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, one single distributin disk comprising a plurality of rings 0 segments connected to said contact-bars and to the other pole of said electromagnet, and means for electrically connecting together the segments of one ring with those of another.

2. In electromagnetic perforating apparatus of the character described, the combination with a source of current, a punching apparatus comprising a punching electromagnet having one pole connected to one pole of the source of current, a paper-band feed mechanism comprising a feed electromagnet having one pole connected to the said pole of the source of current, and a keyboard having all the keys connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, one single distributing disk comprising two concentric rings of segments,

the segments of one ring being connected to said contact-bars, and the segments of the other ring being connected to the other poles of the punching and feed electromagnets, and means for electrically connecting together the segments of one ring with those of another.

3. In electromagnetic perforating apparatus of the character described, the combination with a source of current, a punching apparatus comprising only one punch and a punching electromagnet having one pole connected to one pole of the source of current for punching holes in one longitudinal row, and a keyboard having all the keys connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, one single distributing disk comprising a plurality of rings of segments connected to said contact-bars and to the other pole ofsaid electromagnet, and means for electrically connecting together the segments of one ring with those of another.

4. In electromagnetic perforating apparatus of the character described, the combination with a source of current, a punching apparatus compriscing a punching electromagnet having one pole connected to one pole of the source of current, and a keyboard having all the keys connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, a hook mounted on each key, a locking bar for holding each hook when the keys are depressed, a releasing electromagnet normally holding the locking bar in its inoperative position, one single distributing disk comprising two concentric rows of segments, the end segment of one row being connected to the one pole of the source of current, the end segment of the other row being connected over the releasing magnet to the other pole of the source of current, the remaining segments of the former row being connected to the contact-bars and the remaining segments of the latter row being connected to the other pole of the punching electromagnet, and electrically connected brushes slidable over said rows of segments.

5. In electromagnetic perforating apparatus of the character described; the combination with a source of current, a punching apparatus comprising a punching electromagnet having one pole connected to one pole of the source of current, a paper-band feed mechanism comprising a feed electromagnet having one pole connected to the said pole of the source of current, and a keyboard having all the keys connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, a hook mounted on each key, a locking bar for holding each hook when the keys are depressed, a releasing electromagnet normally holding the locking bar in its inoperative position, one single distributing disk comprising two concentric rows of segments, the end segment of one row being connected to the one pole of the source of current, the end segment of the other row being connected over the releasing electromagnet to the other pole of the source of current, the remaining segments of the former row being connected to the contact-bars, and the remaining segments of the latter row being connected to the other poles of the punching and feed electromagnets, and electrically connected brushes slidable over said rows of segments.

6. In electromagnetic perforating apparatus of the character described, the combi nation with a source of current, a punching apparatus comprising a punching electromagnet having one pole connected to one pole of the source of current, and a keyboard having all the keys connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, one single distributing disk comprising a plurality of rings of segments connected to said contact-bars and to the other pole of said electromagnet, means rotatable about the center of the distributing disk for electrically connecting together the segments of one ring with'those of another, and locking means for locking said means at the endof each revolution.

7. In electromagnetic perforating apparatus of the character described, the combination with a source of current, a punching apparatus comprising a' punching electrothe segments of one ring with those of another, locking means for locking said means at the end of each revolution, and electromagnetic means controlled by the keys for releasing said locking means from the former means when a key is depressed.

8. In electromagnetic perforating apparatus of the character described, the combi-' nation with a source of current, a punching apparatus comprising a punching electromagnet having one pole connected to one pole of the source of current, and a keyboard having all the keys' connected to the other pole of the source of current, of a plurality of contact-bars adapted to be contacted by the keys, one single distributing disk comprising a plurality of rings of segments connected to said contact-bars and to the other pole of said electromagnet, an arm rotatable about the center of the distributing disk, two electrically connected brushes carried by the arm and slidable on the rings of segments, a spring-influenced stop normally arresting said arm, another contactbar adapted to be contacted by the keys when the same are depressed, and an electromagnet connected to the former pole of the source of current and to the latter contact-bar for releasing said stop from said arm when a key is depressed.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

ERWIN EHRHARDT.

Witnesses 1 HENRY HAsPEn, WOLDEMAR HAUPT. 

